chore(deps): update dependency @cypress/webpack-preprocessor to v6

Author: renovate[bot]

package.json

@@ -49,7 +49,7 @@
   },
   "devDependencies": {
     "@cypress/code-coverage": "3.9.11",
-    "@cypress/webpack-preprocessor": "5.10.0",
+    "@cypress/webpack-preprocessor": "6.0.2",
     "@rollup/plugin-alias": "3.1.8",
     "@rollup/plugin-commonjs": "11.1.0",
     "@rollup/plugin-node-resolve": "8.4.0",